Pneumatic radial tire including fine groove

Details Pneumatic radial tire including fine groove Pneumatic radial tire including fine groove

1997-10-30

1999-07-13

Maki, Steven D.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

15220916, 15220923, 15220927, B60C 1101, B60C 1103, B60C10100

Patent

active

059213035

ABSTRACT:
A pneumatic radial tire comprises a pair of bead portions, a pair of sidewall portions, a tread portion, a radial carcass, and a belt, in which the tread portion is comprised of a first tread zone contacting with a flat road surface and a second tread zone projecting toward the side of the first tread zone and contacting with a mountain side of a slant road surface. A half-width (TW.sub.1) of the first tread zone and a width (TW.sub.2) of the second tread zone satisfy TW.sub.2 /TW.sub.1 >2.0.times.10.sup.-2. Further, fine grooves are arranged in at least one of both side end vicinities of the first tread zone so that a widthwise opening center of the fine groove is located within a range of 0.8 TW.sub.1 to 0.9 (TW.sub.1 +TW.sub.2) separated from the equatorial plane of the tire toward the side end of the first tread zone.

REFERENCES:
patent: 4214618 (1980-07-01), Takigawa et al.
patent: 4480671 (1984-11-01), Giron
patent: 4724878 (1988-02-01), Kabe et al.
patent: 4836257 (1989-06-01), Mamada et al.
patent: 4957149 (1990-09-01), Iuchi

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